External Hex Washer Head Self Drilling Screws

Hex head integrated with small washer, with hexagonal clamping position, firm bite with wrench and no slipping.

High recess precision and good concentricity; stainless steel is anti-corrosion and rust-resistant, a highly reliable universal recess for indoor and outdoor heavy assembly and steel structure construction.

Screwing in smoothly without jamming, compatible with manual and electric tools, labor-saving and efficient for mass installation, and has good sealing performance, which can effectively prevent moisture and dust from entering the screw hole and extend the service life of the screw.

After the screw is fully locked, the two side fins will be automatically sheared off without affecting plate fitting, realizing anti-crack reaming in early stage and flat installation in later stage, balancing practicability and appearance.